javax.mail.AuthenticationFailedException: 534-5.7.14 <https://accounts.google.com/signin/continue?sarp=1

Question

I get the following message when trying to send email from an application. Though I have the mail.jar added for my project, it still gives me the same error. P

Answer 1

Acoording to Security and privacy. Google may block sign-in attempts from some apps that do not use modern security standards, such as OAuth 2.0.

For javamail, the solution prevent this error is :

1. Go to the "Less secure apps" section in Google Account.
2. Next to "Access for less secure apps," select Turn on.